Electrochemical degradation of imazalil and pyrimethanil by anodic oxidation on boron-doped diamond

The electrochemical oxidation of mixture pesticides imazilil and pyrimethanil pesticides has been studied on borondoped diamond (BDD) electrodes on acid medium by bulk electrolysis. The influences of current density, conductive electrolyte, pH, and concentration of pesticide were investigated. GC and chemical oxygen demand measurements were conducted to study the reaction kinetics of pesticides mineralization. The best obtained conditions for COD removal on the BDD anode to degrade imazalil and pyrimethanil solutions include operating at 50 mA cm and 25 ± 3 °C. The experimental results showed that the electrochemical process was suitable for almost completely removing COD, due to the production of hydroxyl radicals on the diamond surface (OH) and other electrogenerated oxidants (Cl, ClO).